Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 123, NWS Philadelphia/Mount Holly

July 6, 2007Hunterdon County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2007, 5:08 PM EDT for Hunterdon County, New Jersey. It was in force for 52 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 6, 2007, 5:08 PM EDT (21:08 UTC)
Expired
Jul 6, 2007, 6:00 PM EDT
In force
52 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Hunterdon County, NJ

The radar

The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 21:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jul 6, 5:39 PM EDTHAIL 0.885 Ssw Flemington, NJNICKEL SIZE HAIL WAS REPORTED IN RINGOES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 174 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2007-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2007-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -45 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
39 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
962 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KPHI 062108
SVRPHI
NJC019-062200-
/O.NEW.KPHI.SV.W.0123.070706T2108Z-070706T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
508 PM EDT FRI JUL 6 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 600 PM EDT

* AT 504 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  NORTH OF MILFORD...OR ABOUT 16 MILES EAST OF BETHLEHEM...AND MOVING
  SOUTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CLINTON...6 MILES SOUTHWEST OF HIGH BRIDGE AND 6 MILES NORTHEAST OF
  FRENCHTOWN BY 515 PM EDT...
  ANNANDALE AND 7 MILES SOUTHWEST OF LEBANON BY 520 PM EDT...
  FLEMINGTON AND 8 MILES SOUTHWEST OF WHITE HOUSE STATION BY 530 PM
  EDT...

LAT...LON 4050 7477 4050 7480 4047 7478 4044 7479
      4041 7481 4036 7494 4062 7514 4062 7512
      4068 7504 4069 7500 4071 7497 4071 7480
      4062 7474

$$

JJM
2 follow-up statements
000 
WWUS51 KPHI 062135
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
534 PM EDT FRI JUL 6 2007

NJC019-062200-
/O.CON.KPHI.SV.W.0123.000000T0000Z-070706T2200Z/
HUNTERDON NJ-
534 PM EDT FRI JUL 6 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHERN HUNTERDON COUNTY...

AT 532 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS TO 60 MPH. THIS STORM WAS LOCATED NEAR 
FLEMINGTON...OR ABOUT 20 MILES NORTH OF TRENTON...MOVING SOUTHEAST 
AT 35 MPH.

REMAIN INDOORS UNTIL THE STORM SAFELY CLEARS YOUR AREA.

LAT...LON 4050 7477 4050 7480 4047 7478 4044 7479
      4041 7481 4036 7494 4054 7508 4056 7504
      4056 7503 4058 7501 4060 7492 4061 7473
      4060 7473

$$

GORSE
000 
WWUS51 KPHI 062157
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
557 PM EDT FRI JUL 6 2007

NJC019-062206-
/O.EXP.KPHI.SV.W.0123.000000T0000Z-070706T2200Z/
HUNTERDON NJ-
557 PM EDT FRI JUL 6 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN HUNTERDON COUNTY
EXPIRES AT 600 PM EDT...

THE SEVERE THUNDERSTORM HAS EXITED HUNTERDON COUNTY, THEREFORE THE 
WARNING WILL BE ALLOWED TO EXPIRE AT 600 PM.

THIS STORM PRODUCED NICKEL SIZE HAIL IN RINGOES AT 539 PM.

LAT...LON 4050 7477 4050 7480 4047 7478 4044 7479
      4041 7481 4036 7494 4054 7508 4056 7504
      4056 7503 4058 7501 4060 7492 4061 7473
      4060 7473

$$

GORSE

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 12:34 AM EDTSevere Thunderstorm WarningPHIMonmouth56 min
Jul 6, 12:55 AM EDTSpecial Marine WarningPHI65 min
Jul 6, 2:10 PM EDTExcessive Heat WatchPHIBurlington, Camden, Gloucester, Mercer48 hr
Jul 6, 5:00 PM EDTSevere Thunderstorm WarningPHIWarren21 min
Jul 6, 5:27 PM EDTSevere Thunderstorm WarningPHISomerset48 min
Jul 6, 5:41 PM EDTSevere Thunderstorm WarningPHIMercer49 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2007Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.